scutil.tproj/scutil.c

   1 /*
   2  * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Modification History
  26  *
  27  * June 13, 2005                Allan Nathanson <ajn@apple.com>
  28  * - added SCPreferences support
  29  *
  30  * August 4, 2004               Allan Nathanson <ajn@apple.com>
  31  * - added network configuration (prefs) support
  32  *
  33  * September 25, 2002           Allan Nathanson <ajn@apple.com>
  34  * - added command line history & editing
  35  *
  36  * July 9, 2001                 Allan Nathanson <ajn@apple.com>
  37  * - added "-r" option for checking network reachability
  38  * - added "-w" option to check/wait for the presence of a
  39  *   dynamic store key.
  40  *
  41  * June 1, 2001                 Allan Nathanson <ajn@apple.com>
  42  * - public API conversion
  43  *
  44  * November 9, 2000             Allan Nathanson <ajn@apple.com>
  45  * - initial revision
  46  */
  47
  48 #include <TargetConditionals.h>
  49 #include <ctype.h>
  50 #include <getopt.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <termios.h>
  55 #include <unistd.h>
  56 #include <sysexits.h>
  57
  58 #ifdef  DEBUG
  59 #include <mach/mach.h>
  60 #include <mach/mach_error.h>
  61 #endif  /* DEBUG */
  62
  63 #include "scutil.h"
  64 #include "commands.h"
  65 #include "dictionary.h"
  66 #include "net.h"
  67 #include "nc.h"
  68 #include "prefs.h"
  69 #include "session.h"
  70 #include "tests.h"
  71
  72
  73 #define LINE_LENGTH 2048
  74
  75
  76 __private_extern__ AuthorizationRef     authorization   = NULL;
  77 __private_extern__ InputRef             currentInput    = NULL;
  78 __private_extern__ Boolean              doDispatch      = FALSE;
  79 __private_extern__ int                  nesting         = 0;
  80 __private_extern__ CFRunLoopRef         notifyRl        = NULL;
  81 __private_extern__ CFRunLoopSourceRef   notifyRls       = NULL;
  82 __private_extern__ SCPreferencesRef     prefs           = NULL;
  83 __private_extern__ SCDynamicStoreRef    store           = NULL;
  84 __private_extern__ CFPropertyListRef    value           = NULL;
  85 __private_extern__ CFMutableArrayRef    watchedKeys     = NULL;
  86 __private_extern__ CFMutableArrayRef    watchedPatterns = NULL;
  87
  88 static const struct option longopts[] = {
  89 //      { "debug",              no_argument,            NULL,   'd'     },
  90 //      { "dispatch",           no_argument,            NULL,   'D'     },
  91 //      { "verbose",            no_argument,            NULL,   'v'     },
  92 //      { "SPI",                no_argument,            NULL,   'p'     },
  93 //      { "check-reachability", required_argument,      NULL,   'r'     },
  94 //      { "timeout",            required_argument,      NULL,   't'     },
  95 //      { "wait-key",           required_argument,      NULL,   'w'     },
  96 //      { "watch-reachability", no_argument,            NULL,   'W'     },
  97         { "dns",                no_argument,            NULL,   0       },
  98         { "get",                required_argument,      NULL,   0       },
  99         { "error",              required_argument,      NULL,   0       },
 100         { "help",               no_argument,            NULL,   '?'     },
 101         { "nc",                 required_argument,      NULL,   0       },
 102         { "net",                no_argument,            NULL,   0       },
 103         { "nwi",                no_argument,            NULL,   0       },
 104         { "prefs",              no_argument,            NULL,   0       },
 105         { "proxy",              no_argument,            NULL,   0       },
 106         { "renew",              required_argument,      NULL,   0       },
 107         { "set",                required_argument,      NULL,   0       },
 108         { "snapshot",           no_argument,            NULL,   0       },
 109         { "user",               required_argument,      NULL,   0       },
 110         { "password",           required_argument,      NULL,   0       },
 111         { "secret",             required_argument,      NULL,   0       },
 112         { "log",                required_argument,      NULL,   0       },
 113         { "disable-until-needed", no_argument,  NULL,   0       },
 114         { NULL,                 0,                      NULL,   0       }
 115 };
 116
 117
 118 __private_extern__
 119 CFStringRef
 120 _copyStringFromSTDIN(CFStringRef prompt, CFStringRef defaultValue)
 121 {
 122         char            buf[1024];
 123         int             i;
 124         Boolean         is_user_prompt = (prompt != NULL && isatty(STDIN_FILENO) && isatty(STDOUT_FILENO));
 125         int             len;
 126         char            *modbuf;
 127         int             modlen;
 128         CFStringRef     utf8;
 129
 130         /* Print out a prompt to user that entry is desired */
 131         if (is_user_prompt) {
 132                 if (defaultValue != NULL) {
 133                         SCPrint(TRUE, stdout, CFSTR("%@ [%@]: "), prompt, defaultValue);
 134                 } else {
 135                         SCPrint(TRUE, stdout, CFSTR("%@: "), prompt);
 136                 }
 137         }
 138
 139         /* Get user input */
 140         if (fgets(buf, sizeof(buf), stdin) == NULL) {
 141                 return NULL;
 142         }
 143
 144         /* Prepare for trim */
 145         len = (int)strlen(buf);
 146         modbuf = buf;
 147         modlen = len;
 148
 149         /* Trim new-line */
 150         if ((modlen > 0) && (modbuf[modlen - 1] == '\n')) {
 151                 modbuf[modlen - 1] = '\0';
 152                 modlen--;
 153         }
 154
 155         /* If nothing was entered at the user prompt, set default */
 156         if (is_user_prompt && defaultValue != NULL && modlen == 0) {
 157                 CFRetain(defaultValue);
 158                 return defaultValue;
 159         }
 160
 161         /* Trim spaces from front */
 162         while (modlen > 0 && isspace(modbuf[0])) {
 163                 modbuf = &modbuf[1];
 164                 modlen--;
 165         }
 166
 167         /* Trim spaces from back */
 168         for (i = modlen - 1; i >= 0; i--) {
 169                 if (isspace(buf[i])) {
 170                         buf[i] = '\0';
 171                         modlen--;
 172                 } else {
 173                         break;
 174                 }
 175         }
 176
 177         utf8 = CFStringCreateWithBytes(NULL, (UInt8 *)modbuf, modlen, kCFStringEncodingUTF8, TRUE);
 178         return utf8;
 179 }
 180
 181 static char *
 182 getLine(char *buf, int len, InputRef src)
 183 {
 184         int     n;
 185
 186         if (src->el) {
 187                 int             count;
 188                 const char      *line;
 189
 190                 line = el_gets(src->el, &count);
 191                 if (line == NULL)
 192                         return NULL;
 193
 194                 strncpy(buf, line, len);
 195         } else {
 196                 if (fgets(buf, len, src->fp) == NULL)
 197                         return NULL;
 198         }
 199
 200         n = (int)strlen(buf);
 201         if (buf[n-1] == '\n') {
 202                 /* the entire line fit in the buffer, remove the newline */
 203                 buf[n-1] = '\0';
 204         } else if (!src->el) {
 205                 /* eat the remainder of the line */
 206                 do {
 207                         n = fgetc(src->fp);
 208                 } while ((n != '\n') && (n != EOF));
 209         }
 210
 211         if (src->h && (buf[0] != '\0')) {
 212                 HistEvent       ev;
 213
 214                 history(src->h, &ev, H_ENTER, buf);
 215         }
 216
 217
 218         return buf;
 219 }
 220
 221
 222 static char *
 223 getString(char **line)
 224 {
 225         char *s, *e, c, *string;
 226         int i, isQuoted = 0, escaped = 0;
 227
 228         if (*line == NULL) return NULL;
 229         if (**line == '\0') return NULL;
 230
 231         /* Skip leading white space */
 232         while (isspace(**line)) *line += 1;
 233
 234         /* Grab the next string */
 235         s = *line;
 236         if (*s == '\0') {
 237                 return NULL;                            /* no string available */
 238         } else if (*s == '"') {
 239                 isQuoted = 1;                           /* it's a quoted string */
 240                 s++;
 241         }
 242
 243         for (e = s; (c = *e) != '\0'; e++) {
 244                 if (isQuoted && (c == '"'))
 245                         break;                          /* end of quoted string */
 246                 if (c == '\\') {
 247                         e++;
 248                         if (*e == '\0')
 249                                 break;                  /* if premature end-of-string */
 250                         if ((*e == '"') || isspace(*e))
 251                                 escaped++;              /* if escaped quote or white space */
 252                 }
 253                 if (!isQuoted && isspace(c))
 254                         break;                          /* end of non-quoted string */
 255         }
 256
 257         string = malloc(e - s - escaped + 1);
 258
 259         for (i = 0; s < e; s++) {
 260                 string[i] = *s;
 261                 if (!((s[0] == '\\') && ((s[1] == '"') || isspace(s[1])))) i++;
 262         }
 263         string[i] = '\0';
 264
 265         if (isQuoted)
 266                 e++;                                    /* move past end of quoted string */
 267
 268         *line = e;
 269         return string;
 270 }
 271
 272
 273 __private_extern__
 274 Boolean
 275 process_line(InputRef src)
 276 {
 277         char    *arg;
 278         int     argc                    = 0;
 279         char    **argv                  = NULL;
 280         int     i;
 281         char    line[LINE_LENGTH];
 282         char    *s                      = line;
 283
 284         // if end-of-file, exit
 285         if (getLine(line, sizeof(line), src) == NULL)
 286                 return FALSE;
 287
 288         if (nesting > 0) {
 289                 SCPrint(TRUE, stdout, CFSTR("%d> %s\n"), nesting, line);
 290         }
 291
 292         // break up the input line
 293         while ((arg = getString(&s)) != NULL) {
 294                 if (argc == 0)
 295                         argv = (char **)malloc(2 * sizeof(char *));
 296                 else
 297                         argv = (char **)reallocf(argv, ((argc + 2) * sizeof(char *)));
 298                 argv[argc++] = arg;
 299         }
 300
 301         if (argc == 0) {
 302                 return TRUE;            // if no arguments
 303         }
 304
 305         /* process the command */
 306         if (*argv[0] != '#') {
 307                 argv[argc] = NULL;      // just in case...
 308                 currentInput = src;
 309                 do_command(argc, argv);
 310         }
 311
 312         /* free the arguments */
 313         for (i = 0; i < argc; i++) {
 314                 free(argv[i]);
 315         }
 316         free(argv);
 317
 318         return !termRequested;
 319 }
 320
 321
 322 static void
 323 usage(const char *command)
 324 {
 325         SCPrint(TRUE, stderr, CFSTR("usage: %s\n"), command);
 326         SCPrint(TRUE, stderr, CFSTR("\tinteractive access to the dynamic store.\n"));
 327         SCPrint(TRUE, stderr, CFSTR("\n"));
 328         SCPrint(TRUE, stderr, CFSTR("   or: %s --prefs [preference-file]\n"), command);
 329         SCPrint(TRUE, stderr, CFSTR("\tinteractive access to the [raw] stored preferences.\n"));
 330         SCPrint(TRUE, stderr, CFSTR("\n"));
 331         SCPrint(TRUE, stderr, CFSTR("   or: %s [-W] -r nodename\n"), command);
 332         SCPrint(TRUE, stderr, CFSTR("   or: %s [-W] -r address\n"), command);
 333         SCPrint(TRUE, stderr, CFSTR("   or: %s [-W] -r local-address remote-address\n"), command);
 334         SCPrint(TRUE, stderr, CFSTR("\tcheck reachability of node, address, or address pair (-W to \"watch\").\n"));
 335         SCPrint(TRUE, stderr, CFSTR("\n"));
 336         SCPrint(TRUE, stderr, CFSTR("   or: %s -w dynamic-store-key [ -t timeout ]\n"), command);
 337         SCPrint(TRUE, stderr, CFSTR("\t-w\twait for presense of dynamic store key\n"));
 338         SCPrint(TRUE, stderr, CFSTR("\t-t\ttime to wait for key\n"));
 339         SCPrint(TRUE, stderr, CFSTR("\n"));
 340         SCPrint(TRUE, stderr, CFSTR("   or: %s --get pref\n"), command);
 341         SCPrint(TRUE, stderr, CFSTR("   or: %s --set pref [newval]\n"), command);
 342         SCPrint(TRUE, stderr, CFSTR("   or: %s --get filename path key  \n"), command);
 343         SCPrint(TRUE, stderr, CFSTR("\tpref\tdisplay (or set) the specified preference.  Valid preferences\n"));
 344         SCPrint(TRUE, stderr, CFSTR("\t\tinclude:\n"));
 345         SCPrint(TRUE, stderr, CFSTR("\t\t\tComputerName, LocalHostName, HostName\n"));
 346         SCPrint(TRUE, stderr, CFSTR("\tnewval\tNew preference value to be set.  If not specified,\n"));
 347         SCPrint(TRUE, stderr, CFSTR("\t\tthe new value will be read from standard input.\n"));
 348         SCPrint(TRUE, stderr, CFSTR("\n"));
 349         SCPrint(TRUE, stderr, CFSTR("   or: %s --dns\n"), command);
 350         SCPrint(TRUE, stderr, CFSTR("\tshow DNS configuration.\n"));
 351         SCPrint(TRUE, stderr, CFSTR("\n"));
 352         SCPrint(TRUE, stderr, CFSTR("   or: %s --proxy\n"), command);
 353         SCPrint(TRUE, stderr, CFSTR("\tshow \"proxy\" configuration.\n"));
 354         SCPrint(TRUE, stderr, CFSTR("\n"));
 355         SCPrint(TRUE, stderr, CFSTR("   or: %s --nwi\n"), command);
 356         SCPrint(TRUE, stderr, CFSTR("\tshow network information\n"));
 357         SCPrint(TRUE, stderr, CFSTR("\n"));
 358         SCPrint(TRUE, stderr, CFSTR("   or: %s --nc\n"), command);
 359         SCPrint(TRUE, stderr, CFSTR("\tshow VPN network configuration information. Use --nc help for full command list\n"));
 360
 361         if (_sc_debug) {
 362                 SCPrint(TRUE, stderr, CFSTR("\n"));
 363                 SCPrint(TRUE, stderr, CFSTR("   or: %s --log IPMonitor [off|on]\n"), command);
 364                 SCPrint(TRUE, stderr, CFSTR("\tmanage logging.\n"));
 365         }
 366
 367         if (getenv("ENABLE_EXPERIMENTAL_SCUTIL_COMMANDS")) {
 368                 SCPrint(TRUE, stderr, CFSTR("\n"));
 369                 SCPrint(TRUE, stderr, CFSTR("   or: %s --net\n"), command);
 370                 SCPrint(TRUE, stderr, CFSTR("\tmanage network configuration.\n"));
 371         }
 372
 373         SCPrint(TRUE, stderr, CFSTR("\n"));
 374         SCPrint(TRUE, stderr, CFSTR("   or: %s --error err#\n"), command);
 375         SCPrint(TRUE, stderr, CFSTR("\tdisplay a descriptive message for the given error code\n"));
 376
 377         exit (EX_USAGE);
 378 }
 379
 380
 381 static char *
 382 prompt(EditLine *el)
 383 {
 384 #if     !TARGET_IPHONE_SIMULATOR
 385         return "> ";
 386 #else   // !TARGET_IPHONE_SIMULATOR
 387         return "sim> ";
 388 #endif  // !TARGET_IPHONE_SIMULATOR
 389 }
 390
 391
 392 int
 393 main(int argc, char * const argv[])
 394 {
 395         Boolean                 disableUntilNeeded = FALSE;
 396         Boolean                 doDNS   = FALSE;
 397         Boolean                 doNet   = FALSE;
 398         Boolean                 doNWI   = FALSE;
 399         Boolean                 doPrefs = FALSE;
 400         Boolean                 doProxy = FALSE;
 401         Boolean                 doReach = FALSE;
 402         Boolean                 doSnap  = FALSE;
 403         char                    *error  = NULL;
 404         char                    *get    = NULL;
 405         char                    *log    = NULL;
 406         extern int              optind;
 407         int                     opt;
 408         int                     opti;
 409         const char              *prog   = argv[0];
 410         char                    *renew  = NULL;
 411         char                    *set    = NULL;
 412         char                    *nc_cmd = NULL;
 413         InputRef                src;
 414         int                     timeout = 15;   /* default timeout (in seconds) */
 415         char                    *wait   = NULL;
 416         Boolean                 watch   = FALSE;
 417         int                     xStore  = 0;    /* non dynamic store command line options */
 418
 419         /* process any arguments */
 420
 421         while ((opt = getopt_long(argc, argv, "dDvprt:w:W", longopts, &opti)) != -1)
 422                 switch(opt) {
 423                 case 'd':
 424                         _sc_debug = TRUE;
 425                         _sc_log   = FALSE;      /* enable framework logging */
 426                         break;
 427                 case 'D':
 428                         doDispatch = TRUE;
 429                         break;
 430                 case 'v':
 431                         _sc_verbose = TRUE;
 432                         _sc_log     = FALSE;    /* enable framework logging */
 433                         break;
 434                 case 'p':
 435                         enablePrivateAPI = TRUE;
 436                         break;
 437                 case 'r':
 438                         doReach = TRUE;
 439                         xStore++;
 440                         break;
 441                 case 't':
 442                         timeout = atoi(optarg);
 443                         break;
 444                 case 'w':
 445                         wait = optarg;
 446                         xStore++;
 447                         break;
 448                 case 'W':
 449                         watch = TRUE;
 450                         break;
 451                 case 0:
 452                         if        (strcmp(longopts[opti].name, "dns") == 0) {
 453                                 doDNS = TRUE;
 454                                 xStore++;
 455                         } else if (strcmp(longopts[opti].name, "error") == 0) {
 456                                 error = optarg;
 457                                 xStore++;
 458                         } else if (strcmp(longopts[opti].name, "get") == 0) {
 459                                 get = optarg;
 460                                 xStore++;
 461                         } else if (strcmp(longopts[opti].name, "nc") == 0) {
 462                                 nc_cmd = optarg;
 463                                 xStore++;
 464                         } else if (strcmp(longopts[opti].name, "net") == 0) {
 465                                 doNet = TRUE;
 466                                 xStore++;
 467                         } else if (strcmp(longopts[opti].name, "nwi") == 0) {
 468                                 doNWI = TRUE;
 469                                 xStore++;
 470                         } else if (strcmp(longopts[opti].name, "prefs") == 0) {
 471                                 doPrefs = TRUE;
 472                                 xStore++;
 473                         } else if (strcmp(longopts[opti].name, "proxy") == 0) {
 474                                 doProxy = TRUE;
 475                                 xStore++;
 476                         } else if (strcmp(longopts[opti].name, "renew") == 0) {
 477                                 renew = optarg;
 478                                 xStore++;
 479                         } else if (strcmp(longopts[opti].name, "set") == 0) {
 480                                 set = optarg;
 481                                 xStore++;
 482                         } else if (strcmp(longopts[opti].name, "snapshot") == 0) {
 483                                 doSnap = TRUE;
 484                                 xStore++;
 485                         } else if (strcmp(longopts[opti].name, "log") == 0) {
 486                                 log = optarg;
 487                                 xStore++;
 488                         } else if (strcmp(longopts[opti].name, "disable-until-needed") == 0) {
 489                                 disableUntilNeeded = TRUE;
 490                                 xStore++;
 491                         } else if (strcmp(longopts[opti].name, "user") == 0) {
 492                                 username = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8);
 493                         } else if (strcmp(longopts[opti].name, "password") == 0) {
 494                                 password = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8);
 495                         } else if (strcmp(longopts[opti].name, "secret") == 0) {
 496                                 sharedsecret = CFStringCreateWithCString(NULL, optarg, kCFStringEncodingUTF8);
 497                         }
 498                         break;
 499                 case '?':
 500                 default :
 501                         usage(prog);
 502                 }
 503         argc -= optind;
 504         argv += optind;
 505
 506         if (xStore > 1) {
 507                 // if we are attempting to process more than one type of request
 508                 usage(prog);
 509         }
 510
 511         /* are we checking (or watching) the reachability of a host/address */
 512         if (doReach) {
 513                 if (argc < 1) {
 514                         usage(prog);
 515                 }
 516                 if (watch) {
 517                         do_watchReachability(argc, (char **)argv);
 518                 } else {
 519                         do_checkReachability(argc, (char **)argv);
 520                 }
 521                 /* NOT REACHED */
 522         }
 523
 524         /* are we waiting on the presense of a dynamic store key */
 525         if (wait) {
 526                 do_wait(wait, timeout);
 527                 /* NOT REACHED */
 528         }
 529
 530         /* are we looking up the DNS configuration */
 531         if (doDNS) {
 532                 if (watch) {
 533                         do_watchDNSConfiguration(argc, (char **)argv);
 534                 } else {
 535                         do_showDNSConfiguration(argc, (char **)argv);
 536                 }
 537                 /* NOT REACHED */
 538         }
 539
 540         if (doNWI) {
 541                 if (watch) {
 542                         do_watchNWI(argc, (char**)argv);
 543                 } else {
 544                         do_showNWI(argc, (char**)argv);
 545                 }
 546                 /* NOT REACHED */
 547         }
 548
 549         if (doSnap) {
 550                 if (!enablePrivateAPI
 551 #if     !TARGET_IPHONE_SIMULATOR
 552                     || (geteuid() != 0)
 553 #endif  // !TARGET_IPHONE_SIMULATOR
 554                    ) {
 555                         usage(prog);
 556                 }
 557
 558                 do_open(0, NULL);       /* open the dynamic store */
 559                 do_snapshot(argc, (char**)argv);
 560                 exit(0);
 561         }
 562
 563         /* are we translating error #'s to descriptive text */
 564         if (error != NULL) {
 565                 int     sc_status       = atoi(error);
 566
 567                 SCPrint(TRUE, stdout, CFSTR("Error: 0x%08x %d %s\n"),
 568                         sc_status,
 569                         sc_status,
 570                         SCErrorString(sc_status));
 571                 exit(0);
 572         }
 573
 574         /* are we looking up a preference value */
 575         if (get) {
 576                 if (argc != 2) {
 577                         if (findPref(get) < 0) {
 578                                 usage(prog);
 579                         }
 580                 } else {
 581                         /* need to go back one argument
 582                          * for the filename */
 583                         argc++;
 584                         argv--;
 585                 }
 586
 587                 do_getPref(get, argc, (char **)argv);
 588                 /* NOT REACHED */
 589         }
 590
 591         /* are we looking up the proxy configuration */
 592         if (doProxy) {
 593                 do_showProxyConfiguration(argc, (char **)argv);
 594                 /* NOT REACHED */
 595         }
 596
 597         /* are we changing a preference value */
 598         if (set) {
 599                 if (findPref(set) < 0) {
 600                         usage(prog);
 601                 }
 602                 do_setPref(set, argc, (char **)argv);
 603                 /* NOT REACHED */
 604         }
 605
 606         /* verbose log */
 607         if (log != NULL) {
 608                 if (strcasecmp(log, "IPMonitor")) {
 609                         usage(prog);
 610                 }
 611                 do_log(log, argc, (char * *)argv);
 612                 /* NOT REACHED */
 613         }
 614
 615         /* disableUntilNeeded */
 616         if (disableUntilNeeded) {
 617                 do_disable_until_needed(argc, (char * *)argv);
 618                 /* NOT REACHED */
 619         }
 620         /* network connection commands */
 621         if (nc_cmd) {
 622                 if (find_nc_cmd(nc_cmd) < 0) {
 623                         usage(prog);
 624                 }
 625                 do_nc_cmd(nc_cmd, argc, (char **)argv, watch);
 626                 /* NOT REACHED */
 627         }
 628
 629         if (doNet) {
 630                 /* if we are going to be managing the network configuration */
 631                 commands  = (cmdInfo *)commands_net;
 632                 nCommands = nCommands_net;
 633
 634                 if (!getenv("ENABLE_EXPERIMENTAL_SCUTIL_COMMANDS")) {
 635                         usage(prog);
 636                 }
 637
 638                 do_net_init();                          /* initialization */
 639                 do_net_open(argc, (char **)argv);       /* open prefs */
 640         } else if (doPrefs) {
 641                 /* if we are going to be managing the network configuration */
 642                 commands  = (cmdInfo *)commands_prefs;
 643                 nCommands = nCommands_prefs;
 644
 645                 do_dictInit(0, NULL);                   /* start with an empty dictionary */
 646                 do_prefs_init();                        /* initialization */
 647                 do_prefs_open(argc, (char **)argv);     /* open prefs */
 648         } else {
 649                 /* if we are going to be managing the dynamic store */
 650                 commands  = (cmdInfo *)commands_store;
 651                 nCommands = nCommands_store;
 652
 653                 do_dictInit(0, NULL);   /* start with an empty dictionary */
 654                 do_open(0, NULL);       /* open the dynamic store */
 655         }
 656
 657         /* are we trying to renew a DHCP lease */
 658         if (renew != NULL) {
 659                 do_renew(renew);
 660                 /* NOT REACHED */
 661         }
 662
 663         /* allocate command input stream */
 664         src = (InputRef)CFAllocatorAllocate(NULL, sizeof(Input), 0);
 665         src->fp = stdin;
 666         src->el = NULL;
 667         src->h  = NULL;
 668
 669         if (isatty(fileno(src->fp))) {
 670                 int             editmode        = 1;
 671                 HistEvent       ev;
 672                 struct termios  t;
 673
 674                 if (tcgetattr(fileno(src->fp), &t) != -1) {
 675                         if ((t.c_lflag & ECHO) == 0) {
 676                                 editmode = 0;
 677                         }
 678                 }
 679                 src->el = el_init(prog, src->fp, stdout, stderr);
 680                 src->h  = history_init();
 681
 682                 (void)history(src->h, &ev, H_SETSIZE, INT_MAX);
 683                 el_set(src->el, EL_HIST, history, src->h);
 684
 685                 if (!editmode) {
 686                         el_set(src->el, EL_EDITMODE, 0);
 687                 }
 688
 689                 el_set(src->el, EL_EDITOR, "emacs");
 690                 el_set(src->el, EL_PROMPT, prompt);
 691
 692                 el_source(src->el, NULL);
 693
 694                 if ((el_get(src->el, EL_EDITMODE, &editmode) != -1) && editmode != 0) {
 695                         el_set(src->el, EL_SIGNAL, 1);
 696                 } else {
 697                         history_end(src->h);
 698                         src->h = NULL;
 699                         el_end(src->el);
 700                         src->el = NULL;
 701                 }
 702         }
 703
 704         while (TRUE) {
 705                 Boolean ok;
 706
 707                 ok = process_line(src);
 708                 if (!ok) {
 709                         break;
 710                 }
 711         }
 712
 713         /* close the socket, free resources */
 714         if (src->h)     history_end(src->h);
 715         if (src->el)    el_end(src->el);
 716         (void)fclose(src->fp);
 717         CFAllocatorDeallocate(NULL, src);
 718
 719         exit (EX_OK);   // insure the process exit status is 0
 720         return 0;       // ...and make main fit the ANSI spec.
 721 }